Ryousuke returns to Shionagi after seven years away and transfers into a new school mid-summer. His childhood friend Marika is already there. So is Sora, the sole member of the astronomy club, and new classmates who quickly become friends. He joins the event management committee to make the most of his time. Over the course of that summer, he starts to understand what the girls around him are working toward—and what he wants for himself, with each of them. The love story that begins here extends well past graduation.